Host Plants - Westcott's Plant Disease - page 537

L EAF B LISTER . Taphrina virginica, NH to FL,
TX, WI.
L EAF S POT . Cylindrosporium dearnessi, VA;
Gloeosporium robergei, PA, WI; Septoria
ostryae, IA, NY, WI.
P OWDERY M ILDEW . Microsphaera alni, wide-
spread; Phyllactinia corylea, NY to FL, TX,
WI; Uncinula macrospora, MI, WI.
R OT , Root. Armillaria mellea, cosmopolitan;
Clitocybe tabescens, FL; Phymatotrichum
omnivorum, TX.
R OT , Wood. Daedalea confragosa, cosmopoli-
tan; Fomes spp.; Pleurotus similis, NY;
Poria spp.; Polyporus spp.; Stereum spp.;
Trametes mollis, NY, VT.
R UST . Melampsoridium carpini (II, III), NY;
0, I, unknown.

P OWDERY M ILDEW . Microsphaera alni, MA, IN,
IA, MI, TX; Phyllactinia corylea, AL, IN,
OH, TX, WI.
R OT , Root. Armillaria mellea, FL;

Phymatotrichum omnivorum, TX.
R OT , Wood. Daedalea confragosa, NC;
Polyporus spp., general; Poria spp., general;
Steccherinum sp., CT; Stereum spp., gen-
eral; Daldinia concentrica, MD;
Schizophyllum commune, cosmopolitan.

Horse-Chestnut, Buckeye (Aesculus)

A NTHRACNOSE ; Leaf Blight. Glomerella
cingulata, CT, MD, MO, NJ, NY, TX.
B LIGHT , Twig. Botryosphaeria ribis var.

chromogena, MD, NY, GA.
B LOTCH , Leaf. Guignardia aesculi ( Phyllosticta
paviae ), general.
C ANKER ;D IEBACK . Nectria cinnabarina, cosmo-
politan; Phytophthora cactorum, bleeding
canker, RI; Gibberella acuminatum, CA.
L EAF B LISTER , Yellow. Taphrina aesculi, CA,
TX.
L EAF S POT . Cercospora aesculina FL, VA;
Macrosporium baccatum, KS;
Monochaetia desmazierii, NC;
Micosphaerella maculiformis var.
hippocastani, CA; Septoria glabra, IN;
S. hippocastani, PA, VT, (Sudden Oak
Death) Phytophthora ramorum, CA.
M ISTLETOE . Phoradendron serotinum
(flavescens), South, central states; P. villosum,
CA, OR, TX; Viscum album,CA,on Aesculus
california (California Buckeye).
N ONPARASITIC . Scorch; Leaf Scald. Response to
drought and heat.
P OWDERY M ILDEW . Phyllactinia corylea, CA,
TX; Uncinula flexuosa, widespread.
R OT , Root. Armillaria mellea, cosmopolitan;
Phymatotrichum omnivorum, TX.
R OT , Wood. Collybia velutipes,RI;Ganoderma
applanatum, cosmopoli tan; Polyporus spp.
R UST . Aecidium aesculi, IN, KS, MO, NE.
W ILT . Verticillium albo-atrum, PA.
In a wet season leaves are blotched, turn
brown, and drop from the Guignardia fungus; in

Hop-Tree (Ptelea)

L EAF S POT . Cercospora affiata, IN, MO, TX;
C. pteleae, TX; Phloeospora pteleae, TX;
Phyllosticta pteleicola, IL; Septoria pteleae,
WI.
R OT , Root. Phymatotrichum omnivorum, TX.
R UST . Puccinia windsoriae (0, I), NY to AL, KS;
II, III on grasses.

Hornbeam (Carpinus)

B LIGHT , Twig, Dieback. Gibberella baccata,
AL.
C ANKER , Bark Patch. Aleurodiscus oakesii,NY.
C ANKER , Branch, Trunk. Nectria galligena, CT,
NY; Pezicula carpinea, MA to GA, OK.
C ANKER , Felt Fungus. Septobasidium spp., VA to
FL, LA.
L EAF B LISTER . Taphrina australis, AL, CT,
KY.
L EAF S POT . Clasterosporium cornigerum, MD,
NY, WI; Cylindrosporium dearnessi, MI;
Phyllosticta sp., OK; Sphaerognomonia
carpinea, GA, NY, PA, WV, WI;,
Cercoseptoria caryigena, WI.